This design can most certanly work. What the drawing does not show properly is the location of the barrel seal and it's diameter. If the seal is on the OD of the piston, then absolutely it won't work unless converted to a manually opened QDV. There will be no force to open the piston once the pilot is vented.

If there is no seal from the chamber forward so air pressure is on part of the face of the piston and the seal is at the end of the barrel, then there will be pressure on the piston face to open it. The big problem is there is not enough space to keep this pressure on the face of the piston so when it cracks and the piston face pressure vanishes out the barrel, it will stop opening. A piston with a step down in size to permit air into the piston face area will work fine.
Edit, edited the drawing to show the change.

Extending the valve seat closer to the air chamber would improve the performance.

Edited again to show the extended valve seat which results in a shorter ligher piston and better flow to the face of the piston when it opens. All good things.

0

Attachments

Modification to show new seal area on the barrel. It is not able to have pressure to open.